Electric-lock strike



' N. FIENBERG AND W. L. WAKEHAM.

ELECTRIC LOCK STRIKE.

ABPUCAHON FILED SEPT, 21, 1920.

Patented June 28, 1921.

2 SHEETS-SHEET 1- INVENTORSI NATHAN FIENBERG WALTER LESLIIE WAKEHAM BLJ1mm ATTORNEY N. FIENBERG AND w..L, WAKEHAM.

ELECTRIC LOCK STRIKE. APPLICATION Fl LED SEPT-21. 1920.

m vizmoaa NATHAN FIENBER G WALTERLESLIE WAKLHAM;

Their- ATTORNEY UNITED STATES NATHAN rrnnnnne, or BONDI, NEAR SYDNEY,

Ann WALTER LESLIE WAKEHAM, or

FIVE DOCK, NEAR SYDNEY, NEW SOUTH WALES, AUSTRALIA.

ELECTRIC-LOCK STRIKE.

Specification of Letters Patent.

Patented June 28, 1921.

Application filed September 21, 1920. Serial No. 411,853.

To all whom it may concern Be it known thatv we, NATHAN FIENBERG andWALTER LESLIE .WAKEHAM, subjects of the King of Great Britain andIreland, residing at Doretta, Curlewis street, Bondi, near Sydney, NewSouth Wales, Australia, and F ortescue street, Five Dock, near Sydney,aforesaid, respectively, have invented certain new and usefulImprovements in Electric-Lock Strikes, for which I have filed anapplication in the Commonwealth of Australia, #l2,405, filed Sept. 5,1919, andof which the following is a specification.

This invention relates to electrically controlled latch locks for doors,and it has been devised with the object of providing an effective commonentry door latch lock control system for apartment houses and flatswhereby the occupant of any room or flat may release said lock to admitan incomer, maytascertain if the door has been opened thereafter, andmay relock the door by operating press button. control switches locatedin the flat, and whereby also the lock will be automatically resetbefore the door has been fully opened prior to the entry of an incomerso that when reclosed it will be again effectively relocked.

In the accompanying drawings, Figure 1 is an elevational view of thecontrol board which is located in a flat or apartment;

Fig. 2 is a transverse section on the line 22 Fig. 1;

Fig. 3 is an elevational View of the look as viewed from the inner side,that is the side of the look toward which the door closes; portion ofthe bolt is shown in section in this view Fi 4 is a horizontal sectionHin 3,

Fi 5 is a horizontal section on the plane 55% ig. 3,

on the plane Fig. 6 is a diagrammatic view showing.

the circuit arrangement, and explanatory of the operation of certainparts of the lock; and

Fig. 7 is. a fragmentary view explanatory of the automaticmechanicalre-locking device.

In Fig. 6, A represents a call or letter box fitting which is placedoutside the common door or in a nearby position, one of these fittingsbeing provided for each set of apartments or flats to which the saiddoor serves as a common entry.

B represents a control board fitted in one fiat or apartment, Crepresents operative portions of the latch lock device, and D representsa call bell located in the fiat or apartment. The bell D may be actuatedby a separate battery E orby the battery associated with the lockcontrol equipment which will behereinafter described, and it iscontrolled by the push button F which is mounted in the apartmentfitting A. An indicator window 10 is fitted in proximity to the doorlock, it is preferably glazed with tinted glass on which directions maybe engraved for the information of incomers. In a cavity behind thistinted glass is an electric filament lamp 11. One terminal of this lampis wired to the contact spring 12 in the look, its other terminal isconnected by a wire 13 in parallel to the indicator lamps 14 in theseveral 7 release magnet 24; the other terminal of the winding on thatmagnet is junctioned into the line to earth 19 from the magnet winding17. The back spring 25 on the lock staple pawl 26 is adjusted to contactwith the spring 12 when the pawl 26 is lifted by the magnet 18, but tobreak circuit at 12 when the pawl 26 is in the dropped or lockedposition; Said pawl is earthed at 27 or connected to a return wire.

One terminal of the battery 28 is earthed at 29; its other terminal iswired to the back plate 30 of the controlboard B. The magnet 24 isprovided with a pendular armature 32 counterbalanced at 33 so that itwill normally fall open-that is outward. An upbenttoe 34 on saidarmature is .engageable in a notch on the end of the pawl 26 and is alsoengageable with a spring raised knuckle64 in the latch staple 26. p v

' Referring to Figs. 1 and 2. The operating control board consists of ahollow back 50 covered with a face plate 51 through which the heads offinger buttons 15, 20, and 21 protrude. The stems of these but c withtwo stepped not mission to thecaller, presses the ton 15 on the board inhis flat or apartment,

tons are metallic and are adapted to make contact with the back plate 30of a box casing in which is mounted an insulatorsupport 53 on which thevarious electrical connections to the wires 13, 16 and 22 are fixed, theorder of these connections being shown in'Fig. 1. Springs 54-serve totons 15, 20 and 21 outward, and to establish contact between the stemsof the buttons on the terminal fittings to which the several leads 16,13 and 22 are connected up. It is to be noted that the push button 20controls the circuit of the lamps '14 (B) and 11, these lamps being inseries on the line 13. The lock'control device is a staple fittingadapted to be mortisedinto the door post 57 58 is the door, 59'the framestop, and 60 the latch bolt of the door fitment. This latch bolt may bewithdrawn by means of a latch key in the usual way so that the door maybe opened without requiring operation of the electromagnetic controldevices in which the invention consists. The latch 60 engages a hookshaped staple 36 which is mounted to'turn in ahorizontal path about aheavy pin 62. The staple 36 is pushed to ward the outer or lockedposition by means of a back spring 63; when it is retired it takes upthe position shown in the dotted lines in-Fig. 5; In the top of thestaple is an upwardly disposed knuckle pin 64 restingupon a light spring65 in compression located in a cavity in the jaw portion .of the staple.fThe. staple is normally held in the outer or lOCkBClPOSltlOIl by meansof a drop pawl 26, which is mounted to hang freely on a horizontal pin68 fixed in the casing 69.

The forward end of this pawl 26 is formed hes 70, 71. It carries alsothe back spring 25 which is adapted to make contact when the pawl islifted, with thefixed contact spring'12, the spring 12 being wired backto the lamp 11 as seen in Fig. 6. The binding screws to take the variousconnections are located above the top side of the casing 69 in a cavity7 3 in the doorpost, this cavity allowing convenient room for carryingin and connecting up the wire terminals to said screws. v

The pawl 26 acts as armature to the unlatching electromagnet 18. Therear latching electromagnet 24 is arranged with its axis horizontal andits armature 32 pendent on apin 75, its upper portion being bentbackward and counter-weighted as shown at 33, so that the toe34 on itslower end tends tobear outwardly against the nibbed end of the drop pawl26.

The operation 1s as follows Bymeans of the pushbutton F a callerannounces his presence by the ringing of the 'annunciator bell D in theflat or apartment sought. The occupier, desiring to give adpush butholdthe but-- therefore informs the occupant v or not, as the indicator lamp14 will glow until the door hasbeen thereby'establishing a circuit fromthe battery 28 through the unlatching electromagnet18. V immediatelylifts the pawl armature 26 from the position shown in Fig. 3 up to theposition shown in Fig. 6. As seen in Fig. 3 the lower notch 7 0 on theouter; end of the pawl 26 takes behind the head of the staple 36, andwhile located there it effectually checks movement of the staple 36 torelease the latch bolt 60. .When, however, the pawl 26 is lifted to theposition shown in Fig. 6

its upper notch 71comes above the toe 34 of the hanging armature 32,which immediately engages it and holds" it up; The staple 36 is thusleftfree subject' tothe pressure of the lightspring 63, so that if thedoor be pushed by the caller, the staple will swing back against thespring 63 from'the,

position shown in .fullf lines to the position shown in dotted lines,Fig. 5. When the pawl 26 is raised, the spring 25 makes contact with thespring 12, and this contact is held so long as the pawl 26 is intheupper position shown in Fig. 6. The occupier of the flat. orapartment, by pressing the button 20, in his control board, establishesa circuit through the localindicator lamp 14 and the admissionindicato'rlamp 11, thereby 'assuring himself by observing his pilotlight 14, in the first place, that the staple has been released,"and inthe second place giving notice to the person calling for ad That magnetbeing then energized,

ission that the door lock has been released.

Immediately the door opening movement has brought the latch bolt 60clear of the staple head 36 on which movement the staple is forced backto the dotted position Fig. 5, the knuckle 64 passes under the toe 34 ofthe hangingarmature 32. In the return movement of the staple 36 whichoccurs immediately 6O terminates, the knuckle 64 strikes the toe 34 ofthe armature 32 backward toward the magnet 24, thus dropping the pawl 26from theposition shown in Figs. 6 and 7 to that shown in Fig; 3, so thatthe staple 36 is again locked by it automatically," even before the doorhas been opened sufficiently to clear the rabbet. When the pawl 26 isthus dropped, the' lampcircuit'is broken at 25-12, with the result thatthe lamps 14 and 11 are extinguished. Pressinghom'e the finger button 20tov test the lampcircuit whether the door has been opened opened andwill c'easeto glowafter it has been re-clo-sed. The door 58 is fittedwith a self-closing spring of any ordinary'kind to insure thatit'will'slamc1osed after being opened. If the occupier,;finding that afalse call has been received, owing to the lamp 14 remaining continuingto glow 'as long as the button 20 is held pressedfand he therefore whencontact with theflatch bolt determines to restore the staple to thelocked position, the button 21 is pressed to establish a circuit throughthe line 22 and the resetting magnet 24. This happening, the armature 32is pulled over, thereby drawing the armature toe 84 away from the uppernotch 71 on the end of the pawl 26, thus allowing said pawl to drop toits normal locked position as shown in Fig. 3.

All the several apartments or flats in the building being connected upin parallel, each local circuit self contained with the indicator lamp11 common to all, a complete system of control is established by whichany occupant is enabled to supervise the happenings at the common doorin response to a call. The caller ascertains by means of the indicatorlamp 11 whether the person called for is available, for that lamp doesnot glow unless the button 15 is pressed in the apartment called. Theapartment occupant has at his hands means to satisfy himself when entryhas been effected and if the lock has been automatically reset, and alsohas means provided whereby in the event of the call received being anaccidental one or a mischievous one, the lock may be reset by pressingthe restoring button 21.

What we claim as our invention and desire to secure by Letters Patentis 1. Electromagnetic control means for doors, comprising a springbacked hinged staple engageable by a latch bolt and-adapted when free tobe swung aside to allow said latch end to pass it, a drop pawl adaptedto take behind said staple to chock it, an electromagnet adapted forlifting said pawl to free said staple, a counterbalanced pendentarmature with toe piece'adapted to engage and hold said pawl in itsraised position, a resetting electromagnet adapted to pull off saidpendent armature torelease said pawl, a contacting member on said stapleadapted to strike said pendent armature in the relocking movement ofsaid staple, and separate circuit closing contacts with spring resettingmeans for closing the circuits of said latch staple attachment,comprising a hinged staple, means including an anmature pawl forchocking said staple, means dependent upon the resetting movement ofsaid staple for reengaging said pawl therewith, an electromagnet adaptedto lift said pawl, a trip device adapted to engage and hold said pawlwhen lifted, an electromagnet adapted to disengage said trip device fromsaid pawl, and manually closed switches in battery circuits through saidmagnets.

3. In a device of the character described, the combination with apivotally mounted spring pressed staple adapted to cooperate with a doorlatch, of an electromagnetically controlled drop pawl adapted tonormally hold said staple in locking position, tripping means for saidpawl, electromagnetic means for actuating said tripping means, and amember on the staple for contacting with said tripping means.

4:. In a device of the character described, the combination with apivotally mounted spring pressed staple adapted to cooperate with adoor-latch, of an electromagnetically controlled drop pawl having aplurality of steps at one end thereof, one of said steps being adaptedfor engagement with said staple when the latter engages the door latch,a p'ivotally supported electromagnetically controlled lever having a toepiece for engaging another of said steps in the pawl to hold the latterout of engagement with the staple, and yieldable means carried by thestaple to contact withsaid lever andm-ove said toe piece out ofengagement with its step.

In testimony whereof we afiix our signatures.

NATHAN FIENBERG. WALTER LESLIE WAKEHAM.

